Again, I have to agree with Hammerhead. Don't get me wrong, I think the missle looks INCREDIBLE! No 2 ways about it.
Kudos on the work. If the base of the missle that fits in the missle cradle is too big, you tighten up on the screws to attach it, you could split the gaunt. And, like stated before, due to different sizes of gauntlets, the missle on one may look ill-porportioned on another. Again, it's great work and a great idea, but you should try to get dimensions of the different gauntlets and try to get one missle size that will look and fit in all.
Wes